51411990643 has 16 divisors (see below), whose sum is σ = 57877920576. Its totient is φ = 45312220800.

The previous prime is 51411990611. The next prime is 51411990671. The reversal of 51411990643 is 34609911415.

It is a cyclic number.

It is not a de Polignac number, because 51411990643 - 2⁵ = 51411990611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51411990643.

It is not an unprimeable number, because it can be changed into a prime (51411990673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12193 + ... + 320893.

It is an arithmetic number, because the mean of its divisors is an integer number (3617370036).

Almost surely, 2^51411990643 is an apocalyptic number.

51411990643 is a deficient number, since it is larger than the sum of its proper divisors (6465929933).

51411990643 is a wasteful number, since it uses less digits than its factorization.

51411990643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309294.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 51411990643 in words is "fifty-one billion, four hundred eleven million, nine hundred ninety thousand, six hundred forty-three".